Synchronous triggering of multiple, electrically-isolated vacuum switches using a coaxial transformer

A coaxial transformer-based trigger circuit has been developed to provide high voltage isolation between multiple vacuum switch devices. The circuit, which can be operated from a 5 kV MS32 trigger unit, provides a sufficient drive to the UV trigger electrode in each vacuum switch. The coaxial transformer provides isolation between the trigger electronics and the high voltages associated with the vacuum switch plasma. The transformer also provides isolation between each of the switches. The use of a coaxial transformer in this application makes the overall circuit inductance less critical compared to direct triggering of the switches. The coaxial transformer-based triggering approach enables reliable switching of a number of vacuum switches simultaneously.